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AI IDEs and CLI agents

Reason

Reason (Reason Machines, YC) is an autonomous cloud software engineer for GitHub. Connect a repo, assign issues, and its agents open evidence-backed pull requests with recordings, logs, and diffs. On Oct 15, 2026 it launched multiplayer sessions so a Reason instance can talk with teammates and other agents over web, CLI, Slack, Mac, and phone.

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Pricing
Public plan prices were not posted on reasonmachines.com/pricing at check time. YC current and alumni companies can claim $1,000 in Reason credits via Bookface (Reason for Startups blog, Sep 3, 2026). Checked Oct 15, 2026.
Last verified
15 Oct 2026
Works in
Cloud
Placement
Standard listing

Tags

  • agents
  • cloud
  • github
  • multiplayer
  • ycombinator

Pricing is left as unknown unless a maintainer confirmed it. Featured means the listing is called out on the homepage. Paid placements are labeled sponsored. How money works here.

Sources: reasonmachines.com/, x.com/reasonmachines/status/2110725881681604868, reasonmachines.com/blog/yc.md, www.ycombinator.com/companies/reason-machines.

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